The image of fly fishing is the cast: the elegant arc of line unrolling across a river, the long, graceful loop. So beginners decide that casting — specifically distance and prettiness — is the skill to master, and they pour their practice into throwing line ever further and more beautifully. Then they fish, and they do not catch much, and they are baffled. The cast they obsessed over is the photogenic part of fly fishing. It is not, mostly, the part that catches fish.
What actually catches fish
Two things the beginner usually neglects: reading the water and presenting the fly. Reading the water means knowing where fish actually hold — the seams, the current edges, the spots where fish rest and feed — so that you cast to where the fish are rather than impressively to where they are not. Presentation means the fly landing and drifting in a way that looks natural to the fish, with no unnatural drag from the line dragging it across the current. A short, accurate, well-presented cast to a fish you correctly located catches far more than a long, beautiful cast to empty water with the fly dragging unnaturally.
Why the cast gets the obsession
Because it is the visible, practiceable, impressive skill — you can do it on a lawn, it looks like expertise, and it is what fly fishing looks like in every photograph. Reading water is subtle and learned on the river; presentation is invisible to onlookers. So the legible, glamorous skill absorbs the attention while the unglamorous, decisive ones get neglected.
The takeaway
Learn to cast well enough — competent, accurate, controlled at the modest ranges that actually matter — and then stop obsessing over distance and beauty. Put your real effort into reading the water, so you fish where the fish are, and into presentation, so your fly drifts naturally. Those are the skills that fill a net. The beautiful long cast is the part that looks like fly fishing; reading and presenting are the parts that are fly fishing.